NEW YORK, NY - DECEMBER 05: (Editorial Use Only) Singer-songwriter Eric Church performs on stage during the Imagine: John Lennon 75th Birthday Concert at The Theater at Madison Square Garden on December 5, 2015 in New York City. (Photo by Kevin Mazur/Getty Images for Blackbird)

NEW YORK, NY - DECEMBER 05:  (Editorial Use Only) Singer-songwriter Eric Church performs on stage during the Imagine: John Lennon 75th Birthday Concert at The Theater at Madison Square Garden on December 5, 2015 in New York City.  (Photo by Kevin Mazur/Getty Images for Blackbird)